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Hi Stephen,

OK, the theory goes that a car registered between January and July 2008 will automatically switch to the CO₂-based system at its first renewal if, and only if, it’s beneficial to do so. In other words, and this is according to the Motor Tax office, it’ll stay on the old system if it’s cheaper to do so.

According to what you’ve told us, your car should have switched to the new system no later than June of 2009, but needless to say it’s possible for it to have, for some reason, slipped through the net. I’d think a quick chat with your local motor tax office should sort it out either way. 

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Hi Corionna,

We're going to assume that this is a relatively recent Mokka, using the 1.6-litre 136hp diesel engine. That car has rated combined fuel consumption of 4.3 litres per 100km, so you’re going to burn roughly 8.7 litres covering 201km, and that’s going to work out at about €11.22 in fuel costs each day. Except, of course, you’re not going to get 4.3 litres per 100km, not unless you drive like a saint anyway. Safer to assume you’ll burn through 6.0 litres per 100km of fuel, which means you’ll pay around €15 in fuel costs for each 200km journey. Depending on fuel prices, obviously.

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Hi Dave,

Sadly not. You will save around 50 per cent on the price per litre of LPG compared to petrol or diesel (which in and of itself might be a sufficiently compelling reason to switch), but there’s no tax advantage. A car’s motor tax rate is based on the CO₂ figure shown on its certificate of conformity document, and a post-purchase conversion doesn’t change that (even though LPG does have a slightly lower CO₂ rating than petrol or diesel). Basically, tax is calculated on the car’s official homologated figure, whereas an LPG conversion is something you do yourself afterwards. 

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Hi Aisling,

Our information would agree with what you were told, that the recommended interval is indeed 210,000km, regardless of time. Remember: treat that as a maximum, not a minimum...

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Hi Hugh,

Prices for changing the belt will vary depending on the garage you bring the car to and whether they use genuine Audi parts, so best thing to do is shop around. I can tell you that, assuming you have a 2.0-litre TDI diesel model, the work should take no longer than three hours.

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Hi Anthony,

That’s a big question, and it really comes down to how you drive your car and, just as importantly, where you drive it. If you’re someone who drives long-haul on motorways week-in, week-out, then diesel power is still the best option for you, as for longer journeys there’s nothing more frugal. Some hybrids are getting closer to diesel economy on longer runs, but they’re not quite at parity yet. If you’re mostly doing short hops, or driving around town most of the time, then either petrol or hybrid power is the right way to go. Those are generalisations though — a lot will depend on your specific needs and tastes, and what sort of car you want. 

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Hi Afeez,

I’m assuming that’s a 1.6 HDI diesel model? If so you need to watch for excessive black smoke from the exhaust, which could indicate a blown turbo. Check too to see if the diesel particulate filter is working properly — if it’s a low-mileage car (and that is quite low miles) then it may not have been driven regularly enough to keep the filter clean, and they’re expensive to fix and clean. If it has air conditioning then that needs specific servicing so check that has been done and, if you notice that the car pulls to the left at higher speed, then it might need new front tyres. Other than that check that all switches and buttons are working properly, and that the car has a full and complete service history.

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Hi Stephen,

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Hi Gustavo,

Well, reliability and running costs are not necessarily the same thing. The ultimate in reliability is probably a Toyota Land Cruiser, but that’s hardly cheap to run or to tax… I think there’s a couple of good options here, though. Sticking with Toyota, the Auris is a solid bet, and even more so if you go for the Hybrid model, which will help keep your tax and fuel costs down. Get the Tourer estate model if you need maximum family space.

The Honda Civic is also a very good bet, and the 1.6 iDTEC diesel is probably the best model to go for to keep fuel and tax bills down. Again, if you want maximum space for the kids and their things, track down the (rather handsome) estate version.

Skoda’s Octavia is solidly reliable too (again, the Combi estate is the one to go for) and you can choose from 1.6 TDI diesel, or an excellent 1.2 TSI petrol turbo, both of which are frugal and tax-efficient. Just check its history to see if it’s been used as a taxi — many have been.

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Hi Adrian,

It should be changed every 150,000 kilometres or every six years, whichever comes first. Hence, if your car has never had its belt changed, it really should be done this year.